Let Contraints Controll Mute/Unmute Audio Local Playback For Desktop Sharing

content/browser/media/capture/web_contents_audio_input_stream.cc

Index: content/browser/media/capture/web_contents_audio_input_stream.cc
diff --git a/content/browser/media/capture/web_contents_audio_input_stream.cc b/content/browser/media/capture/web_contents_audio_input_stream.cc
index 4a58cc34c090837a49ec652fc2e30ab040bb0a4d..7df83a2a5216db60e96308c03c81e855c8417a40 100644
--- a/content/browser/media/capture/web_contents_audio_input_stream.cc
+++ b/content/browser/media/capture/web_contents_audio_input_stream.cc
@@ -349,8 +349,7 @@ WebContentsAudioInputStream* WebContentsAudioInputStream::Create(
     const std::string& device_id,
     const media::AudioParameters& params,
     const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
-    AudioMirroringManager* audio_mirroring_manager,
-    bool is_duplication) {
+    AudioMirroringManager* audio_mirroring_manager) {
   int render_process_id;
   int main_render_frame_id;
   if (!WebContentsMediaCaptureId::ExtractTabCaptureTarget(
@@ -358,13 +357,16 @@ WebContentsAudioInputStream* WebContentsAudioInputStream::Create(
     return NULL;
   }
 
+  bool mute_source;
+  WebContentsMediaCaptureId::ExtractOptions(device_id, nullptr, &mute_source);
+
   return new WebContentsAudioInputStream(
       render_process_id, main_render_frame_id, audio_mirroring_manager,
       new WebContentsTracker(false),
       new media::VirtualAudioInputStream(
           params, worker_task_runner,
           media::VirtualAudioInputStream::AfterCloseCallback()),
-      is_duplication);
+      !mute_source);
 }
 
 WebContentsAudioInputStream::WebContentsAudioInputStream(